Altera Low Latency 40-Gbps Ethernet MAC and PHY MegaCore Function - Manual (Page 21)

Parameter Type Range Default Setting Parameter Description
Average
interpacket
gap
String • Disable deficit
idle counter
• 8
• 12
12 If you set the value of this parameter
to 8 or to 12, the IP core includes a
deficit idle counter (DIC), which
maintains an average interpacket
gap (IPG) of 8 or 12, as you specify.
If you set the value of this parameter
to Disable deficit idle counter, the
IP core is configured without the
DIC, and does not maintain the
required minimum average IPG.
The Ethernet standard requires a
minimum average IPG of 12.
Turning off Average interpacket
gap increases bandwidth.
MAC Options
Enable 1588
PTP
Boolean • True
• False
False If turned on, the IP core supports
the IEEE Standard 1588-2008
Precision Clock Synchronization
Protocol, by providing the hooks to
implement the Precise Timing
Protocol (PTP).
If you select the custom streaming
client interface, the IP core must be
configured without 1588 support,
and this parameter is not available.
Enable link
fault
generation
Boolean • True
• False
False If turned on, the IP core includes the
link fault signaling module and
relevant signals. If turned off, the IP
core is configured without this
module and without these signals.
Turning on link fault signaling
provides your design a tool to
improve reliability, but increases
resource utilization.
UG-01172
2015.05.04
IP Core Parameters 2-7
Getting Started Altera Corporation
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